A modular foundation structure for artificial surface systems may include a plurality foundation sections. Each of the foundation section may comprise a structure base layer, an adhesive layer, and an impact and thermal protective layer. The adhesive layer may cover the structural base layer, and the impact and thermal protective layer may be attached to the structural base layer via the adhesive layer. The foundation sections may be provided as separate foundation sections that may be positionable to be attached to one another to form the modular foundation structure. The foundation sections may be attachable one another with a section adhesive. Embodiments may include a connection edge that may be positioned to surround and abut a perimeter of the modular foundation structure. Embodiments may also include an artificial surface layer that may be positioned to cover an upper surface area of the modular foundation structure.